LONDON (AP) — Scottish police say the killing of a Muslim shopkeeper who wished Christians a happy Easter is being investigated as "religiously prejudiced."

Vigils were held Friday and Saturday in memory of 40-year-old Asad Shah, who was killed Thursday night in Glasgow.

He had apparently posted messages on Facebook calling for religious harmony: "Good Friday and very happy Easter, especially to my beloved Christian nation x!"

Police say a 32-year-old man has been arrested in connection with Shah's death. The suspect, who police say is Muslim, has not been identified or charged.

Scottish First Minister Nicola Sturgeon joined the Friday vigil in support of Shah and his family in Glasgow. Many lit candles and left flowers. Roughly 150 people also gathered in a light rain on Saturday to honor him, an event organized by local teens.

Police Scotland said that "a full investigation is under way to establish the full circumstances surrounding the death which is being treated as religiously prejudiced."